
function hello(){
	echo 'hello, world!'
}

function tell_who_i_am(){
	echo $(whoami)
}
function which_distro_do_i_use(){
	echo $(cat /etc/os-release | grep ^NAME)
} 
function view_my_cpu_arch(){
	echo $(uname -m)
}
function show_first_scsi_disk_size(){
	echo $(lsblk -l | \grep disk | \grep '^sda ' |awk '{print $4}' | cut -c 1-2)
}
function show_main_memory_size_in_megabytes() {
    free -m |grep "Mem:" |awk '{print $2}'
}
